jdart wrote:from a recent offline tourney, Gull 1.1 vs. Hannibal 1.0:
[D] 7r/k4pp1/pn2p1pr/2ppP3/1q3P2/1PN2R1P/P1P2QP1/3R3K w - -
6 minutes for Crafty 23.3 to solve on a slow quad (depth 25).
--Jon
Well maybe this is due to another search bug but some of the high scores reported may not be wins, Rainbow Serpent starts failing low on them after a while. Rainbow Serpent fails to come up with a winning score if after 1. a3 Qxa3 2. Qf1 Qb4 3. Ra1 Black sticks to playing 3... c4 Most engines I see only play 3. Kb7 after a while so maybe there is a bug why Rainbow Serpent can't see White winning anymore, once 3... c4 is played. I mean the score shows enough compensation for the pawn but it seems to stay level so there may be no win, either that or the search at the moment "sucks bigtime"
This was done with very small transposition memory:
[FEN "7r/k4pp1/pn2p1pr/2ppP3/1q3P2/1PN2R1P/P1P2QP1/3R3K w - -"]
1. a3 Qxa3 2. Qf1 Qb4 3. Ra1 c4 *
[D]7r/k4pp1/pn2p1pr/3pP3/1qp2P2/1PN2R1P/2P3P1/R4Q1K w - -
Engine: Rainbow Serpent 2.0 Build 067 (Athlon 2009 MHz, 16 MB)
by Romstad, Costalba, Kiiski
1/01 0:00 -0.92 4.Re3 (3.144) 209
2/02 0:00 -1.45 4.Re3 d4 (3.369) 224
2/02 0:00 -1.17 4.Rg3 d4 (3.628) 241
2/02 0:00 -1.13 4.Qe2 d4 (3.901) 260
2/07 0:00 -1.01 4.Kg1 Qc5+ 5.Qf2 Qxf2+ 6.Rxf2 cxb3
7.cxb3 (3.968) 264
3/07 0:00 -1.01 4.Kg1 Qc5+ 5.Qf2 Qxf2+ 6.Rxf2 cxb3
7.cxb3 (4.739) 152
4/05 0:00 -1.05 4.Kg1 Kb7 5.Qe2 Qc5+ 6.Re3 (6.142) 198
4/11 0:00 -0.80 4.bxc4 Nxc4 5.Qf2+ Qb6 6.Nb5+ Kb7
7.Nd6+ Nxd6 8.Qxb6+ Kxb6 9.exd6 (6.969) 224
5/06 0:00 -0.88 4.bxc4 Nxc4 5.Qf2+ Kb7 6.Rd3 Qb6 (8.068) 260
6/07 0:00 -1.05 4.bxc4 Nxc4 5.Qf2+ Kb7 6.Rd3 Qb6
7.Rb1 (9.398) 303
7/05 0:00 -0.83++ 4.bxc4 Nxc4 5.Qf2+ Kb7 6.Rb1 (11.785) 380
7/11 0:00 -0.80 4.bxc4 Nxc4 5.Qf2+ Qb6 6.Nb5+ Kb7
7.Nd6+ Nxd6 8.Qxb6+ Kxb6 9.exd6 (12.558) 273
8/12 0:00 -1.13-- 4.bxc4 Nxc4 5.Qf2+ Qb6 6.Nb5+ Kb7
7.Nd6+ Nxd6 8.Qxb6+ Kxb6 9.exd6 a5 (16.338) 355
8/09 0:00 -0.88 4.Na4 Nxa4 5.Rxa4 Qb5 6.Ra1 Kb7
7.bxc4 Qxc4 8.Qf2 (30.250) 387
9/13 0:00 -0.88 4.Na4 Nxa4 5.Rxa4 Qb5 6.Qf2+ Kb7
7.Ra1 Qb6 8.Kg1 a5 9.bxc4 dxc4
10.Rfa3 (58.317) 311
9/12 0:00 -0.76 4.Qf2 Rc8 5.Ne2 a5 6.bxc4 Rxc4
7.Rfa3 a4 8.Rxa4+ Qxa4 9.Rxa4+ Rxa4 (77.882) 311
10/12 0:00 -0.76 4.Qf2 Rc8 5.Ne2 a5 6.bxc4 Rxc4
7.Rfa3 a4 8.Rxa4+ Qxa4 9.Rxa4+ Rxa4 (93.268) 298
11/12 0:00 -0.76 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rc6 (138.886) 306
12/13 0:00 -0.68++ 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rc6
10.Nd4 (206.841) 294
12/13 0:00 -0.60++ 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rc6
10.Nd4 (224.890) 293
12/13 0:00 -0.44++ 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rc6
10.Nd4 (267.257) 285
12/14 0:01 -0.56-- 4.Qf2 Rc8 5.Ne2 a5 6.bxc4 Rxc4
7.Rfa3 a4 8.Rxa4+ Qxa4 9.Rxa4+ Rxa4
10.Nc3 Rc4 (289.524) 285
12/12 0:01 -0.48 4.Qf2 Rc8 5.Ne2 a5 6.c3 Qb5 7.Nd4 Qa6
8.bxc4 Rxc4 9.Rb1 Rh5 (349.870) 279
13/15 0:01 -0.36 4.Qf2 Rc8 5.Ne2 a5 6.c3 Qb5 7.Nd4 Qa6
8.bxc4 Rxc4 9.Rb1 a4 10.Nb5+ Kb8
11.Nd6 (456.890) 286
14/05 0:02 -0.08++ 4.Qf2 Rc8 5.Ne2 a5 6.c3 (822.200) 277
14/16 0:03 -0.40 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rb5
10.Rxb5 axb5 11.Rxb5 Rh8 (941.680) 276
15/08 0:04 -0.28++ 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 (1.191.038) 275
15/17 0:04 -0.24 4.Qf2 Rc8 5.Ne2 Kb7 6.bxc4 Rxc4
7.Rb3 Qc5 8.Qxc5 Rxc5 9.Rab1 Rb5
10.Rxb5 axb5 11.Rxb5 Rh8 12.Kh2 (1.302.783) 276
16/07 0:07 -0.04++ 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 (1.932.514) 274
16/01 0:08 +0.16++ 4.Qf2 (2.361.205) 276
16/19 0:09 +0.16 4.Qf2 Rc8 5.bxc4 Rxc4 6.Na4 Qb5
7.Rb3 Rb4 8.Rxb4 Qxb4 9.Qc5 Qxc5
10.Nxc5 Nc4 11.Rxa6+ Kb8 12.Kh2 Ne3
13.c3 (2.776.882) 278
17/02 0:15 +0.64++ 4.Qf2 Rc8 (4.316.504) 278
17/14 0:23 +0.68 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Rb4 Rc6
10.Rb1 Rh8 (6.484.194) 280
18/14 0:29 +0.68 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Rb4 Rc6
10.Rb1 Rh8 (8.177.349) 280
19/14 0:47 +0.76 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Rb4 Rc6
10.Qd4 Rh8 (13.255.190) 277
20/02 1:07 +0.84++ 4.Qf2 Rc8 (18.736.205) 277
20/01 1:23 +0.92++ 4.Qf2 (23.086.954) 277
20/03 1:40 +0.80-- 4.Qf2 Rc8 5.bxc4 (27.730.277) 277
20/13 2:19 +0.88 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Rb4 Rc6
10.Rb1 (38.871.414) 278
21/13 3:00 +0.80 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Rb4 Rc6
10.Rb1 (50.321.718) 279
22/02 4:18 +0.96++ 4.Qf2 Rc8 (72.316.940) 280
22/02 4:34 +0.72-- 4.Qf2 Rc8 (77.010.164) 280
22/01 6:39 +1.04++ 4.Qf2 (111.533.171) 279
22/02 8:22 +1.36++ 4.Qf2 Rc8 (140.078.999) 278
22/17 9:16 +1.33 4.Qf2 Rc8 5.bxc4 Rxc4 6.Na4 d4 7.Rb3 Qa5
8.Rxb6 Rxa4 9.Rbb1 Rxa1 10.Qxd4+ Ka8
11.Rxa1 Qb5 12.Kg1 (155.431.013) 279
23/09 11:38 +1.37 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 (196.316.158) 280
24/15 18:24 +1.45 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 Rh8 11.Qa3 (311.758.573) 282
25/17 28:38 +1.37 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 Rh8 11.Qa3 Nc8 12.Rb2 (488.339.877) 284
26/13 43:37 +1.37 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 (743.668.923) 284
27/13 65:19 +1.37 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 (1.114.618.312) 284
28/16 108:29 +1.37 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 Rh8 11.Qa3 Nc8 (1.857.626.366) 285
29/03 146:15 +1.29-- 4.Qf2 Rc8 5.bxc4 (2.898.200.462) 330
29/01 224:36 +1.40++ 4.Qf2 (5.578.834.116) 413
29/02 234:36 +1.22-- 4.Qf2 Rc8 (5.928.147.659) 421
29/01 321:54 +1.48++ 4.bxc4 (8.899.937.183) 460
29/01 385:25 +1.64++ 4.bxc4 (11.096.503.411) 479
29/02 444:36 +1.25-- 4.Qf2 Rc8 (13.169.980.599) 493
29/13 510:59 +1.41 4.Qf2 Rc8 5.bxc4 Qxc4 6.Na4 Rc6
7.Rc3 Qxa4 8.Rxa4 Rxc3 9.Ra2 Rc6
10.Qe3 (15.461.113.485) 504
30/03 551:20 +1.33-- 4.Qf2 Rc8 5.bxc4 (16.869.241.988) 509
30/02 633:14 +1.22-- 4.Qf2 Rc8 (19.744.147.884) 519
best move: Qf1-f2 time: 635:07.219 min n/s: 519.809 nodes: 19.808.485.234
After 1.a3 Rainbow Serpent wasn't sure if 3... c4 is better than 3... Kb7
but this was searched less deep. Both searches were running in parallel for a while so the nodes per second are only at 50% and I had no more memory for the second search.
[D]7r/k4pp1/pn2p1pr/2ppP3/1q3P2/PPN2R1P/2P2QP1/3R3K b - -
Engine: Rainbow Serpent 2.0 Build 067 (Athlon 2009 MHz, 256 MB)
by Romstad, Costalba, Kiiski
15/15 0:00 +0.64++ 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 a5 6.bxc4 Rxc4 7.Rb3 Qc5 8.Qe1 a4 (383.307) 522
15/15 0:00 +0.72++ 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 a5 6.bxc4 Rxc4 7.Rb3 Qc5 8.Qe1 a4 (411.615) 516
15/17 0:00 +0.76 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 a5 6.bxc4 Rxc4 7.Rfa3 a4
8.Rxa4+ Qxa4 9.Rxa4+ Rxa4 (475.874) 525
16/12 0:01 +0.56-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 a5 6.c3 Qxb3 7.Nd4 (717.971) 528
16/18 0:01 +0.36 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rc6 10.Nd4 (946.389) 526
17/20 0:02 +0.08 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 (1.384.485) 521
18/20 0:03 +0.08 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 (1.848.465) 523
19/21 0:04 +0.24++ 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 Rh8 (2.413.065) 527
19/21 0:04 +0.40++ 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 Rh8 (2.530.250) 529
19/22 0:05 +0.24 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 Rh8 12.Kh2 (2.987.997) 531
20/22 0:08 +0.24 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.Ne2 Kb7 6.bxc4 Rxc4 7.Rb3 Qc5
8.Qxc5 Rxc5 9.Rab1 Rb5 10.Rxb5 axb5
11.Rxb5 Rh8 12.Kh2 (4.589.680) 539
21/16 0:12 +0.16-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 Qa5 7.Rfa3 d4
8.Nxb6 Qxb6 9.Qe2 (6.841.361) 543
21/09 0:16 +0.08-- 1...Qxa3 2.Qf1 Nc8 3.Ra1 Qxa1 4.Qxa1 Kb7
5.Qg1 Kc6 (9.175.444) 550
21/26 0:20 0.00 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 d4 7.Nxb6 Qxb6
8.Rfa3 Rh8 9.c3 Qc6 10.cxd4 Rc1+
11.Kh2 Rxa1 12.Rxa1 Qb6 13.Qc2 Rd8
14.Rb1 (11.485.273) 550
22/09 0:26 -0.24-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 (14.696.974) 553
22/10 0:36 -0.49-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 a5 4.Nb5+ Kb8
5.Nd6 d4 6.Nxf7 (20.333.567) 552
22/25 0:45 -0.44 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 d4 7.Rb3 Qa5
8.Rxb6 Rxa4 9.Rxa4 Qxa4 10.Rd6 Kb7
11.Rxd4 Qc6 12.Kg1 Rh8 13.Rb4+ Kc8 (24.996.863) 552
23/25 0:59 -0.72 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 d4 7.Rb3 Qa5
8.Rxb6 Rxa4 9.Rxa4 Qxa4 10.Rd6 Kb7
11.Rxd4 Qc6 12.Kg1 a5 13.Rd6 Qc7 (32.719.409) 552
24/25 1:28 -0.72 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 d4 7.Rb3 Qa5
8.Rxb6 Rxa4 9.Rxa4 Qxa4 10.Rd6 Kb7
11.Rxd4 Qc6 12.Kg1 a5 13.Rd6 Qc7 (48.821.271) 552
25/27 2:33 -0.60 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 4.Qf2 Rc8
5.bxc4 Rxc4 6.Na4 d4 7.Rb3 Qa5
8.Rxb6 Rxa4 9.Rxa4 Qxa4 10.Rd6 Kb7
11.Rxd4 Qc6 12.Kg1 a5 13.Rd6 Qc7
14.Qf3+ Kb8 (84.486.380) 550
26/05 3:41 -0.72-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 (121.082.265) 547
26/04 4:58 -0.86-- 1...Qxa3 2.Qf1 Nc8 3.Ra1 (163.336.563) 547
26/08 8:11 -1.16-- 1...Qxa3 2.Qf1 f5 3.Ra1 Qxa1 4.Qxa1 Kb7
5.Qf1 (269.368.843) 547
26/01 9:16 -1.21++ 1...Qxa3 (305.722.909) 549
26/01 9:18 -1.09++ 1...Qxa3 (306.798.326) 549
26/01 9:19 -0.85++ 1...Qxa3 (307.554.594) 549
26/05 20:04 -1.76-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 Kb7 (546.736.626) 453
26/01 23:04 -1.68++ 1...Qxa3 (597.973.996) 431
26/23 36:55 -1.97 1...Qxa3 2.Qf1 Qb4 3.Ra1 Kb7 4.Qxa6+ Kc6
5.Qf1 Rb8 6.Ra7 c4 7.Rxf7 Rb7 8.Rxb7 Kxb7
9.bxc4 Qxc4 10.Nb5 Qxf1+ 11.Rxf1 Rh8
12.Nd4 Re8 (818.709.841) 369
27/23 39:05 -1.97 1...Qxa3 2.Qf1 Qb4 3.Ra1 Kb7 4.Qxa6+ Kc6
5.Qf1 Rb8 6.Ra7 c4 7.Rxf7 Rb7 8.Rxb7 Kxb7
9.bxc4 Qxc4 10.Nb5 Qxf1+ 11.Rxf1 Rh8
12.Nd4 Re8 (854.688.395) 364
28/18 50:51 -1.81 1...Qxa3 2.Qf1 Qb4 3.Ra1 Kb7 4.Qxa6+ Kc6
5.Qf1 Rb8 6.Ra7 c4 7.Rxf7 Rb7 8.Rxb7 Kxb7
9.bxc4 Qxc4 10.Nb5 (1.047.810.830) 343
29/05 61:55 -1.65++ 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 (1.232.268.894) 331
29/01 62:37 -1.49++ 1...Qxa3 (1.243.791.554) 331
29/01 63:31 -1.17++ 1...Qxa3 (1.259.046.416) 330
29/05 86:04 -1.41-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 c4 (1.619.577.785) 313
29/05 117:28 -1.62-- 1...Qxa3 2.Qf1 Qb4 3.Ra1 Kb7 (2.138.003.626) 303
best move: Qb4xa3 time: 137:59.329 min n/s: 298.740 nodes: 2.473.365.127